are a giveaways. the flu really tends to come on quickly. we have all sorts of different symptoms that we talk about, the fever, the cough, the muscle aches. with cold, you may get one or two of these things at a time. sometimes, they overlap a little bit. with flu, it's often like you feel okay tuesday morning, and by wednesday afternoon, you're sort of just knocked down, in bed, can't get up. and also, with this particular strain, which is called h3-n2, it tends to be more severe symptoms than we've seen in the past, and they're also lasting longer, seven days or so on average. >> so if someone's sick right now, sanjay, what's the best way to treat it? >> mom's advice probably applies best, go home, get rest, get plenty of fluids. i know that sounds make overly simplistic, but that is going to be important for a couple of reasons. number one, you need to get rest to allow your immune system to tackle the virus. but staying home means you're isolating yourself, and you're not getting other people sick. you've got to think about other people around you as well, in your workplace and in your community.